Pantograph engraving-machine.



No. 665,097. Patented Jan. I, I90l.

JOHN HOPE & JOHN HOPE, In. PANTOGBAPH ENGRAVING MACHINE.

(Application filed Aug. 21. 1899.)

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(No Model.)

zzxz YEN Z'DH No. 665,097. rammed Ian. I, I90l.

JOHN HOPE & mun HOPE, In. PANTUGRAFH ENHRAVING MACHINE.

(Appliatidn'filed A; 21. 1899.) (N0 "0 r 2 Shaw -Shoot 2.

s A \x f 1 WITNEEEiEE/I fiamzgzmy? J erence being had to theaccompanying draw- NITED STATES PATENT FFICE.

JOHN HOPE AND JOHN HOPE, JR., OF PRovIDENoE, RHODE ISLAND, AS- SIGNORSTO THE JOHN HOPE. & SONS ENGRAVING AND MANUFAC- TUBING COMPANY, or SAMEPLACE.

PANTQG RAPH ENG RAVlNG-MACHIN E.

SPECIFIQATION forming partof Letters Patent No. 665,097, dated January1, 1901.

Application filed August 21, 1899.

To all whom it may concern.-

Be it known that we, JOHN HOPE and JOHN HOPE, Jr, of Providence, in thecounty of Providence and State of Rhode Island, have invented a new anduseful Improvement in Pantograph Engraving-Machines; and we herebydeclare that the following is a full, clear, and exact description ofthesame, refings, forming part of this specification.

This invention has reference to an improvement in pantographengraving-machines; and it consists in the peculiar and novelconstruction and the combination of parts more fully set forthhereinafter.

In pantograph engraving-machines the pattern of the design to beengraved on the rolls is larger and usually many times larger than thedesign. This pattern is placed on the table of the pantographengraving-machine and is traced by the stylus, supported usually on acarriage, the longitudinal motion of which is transmitted on adiminished scale to the carriages supporting the gravers. The traversemotion of the stylus-carriage is transmitted to the roller and rotatesthe same at a given diminished scale, so as to reproduce the design ofthe pattern on a smaller scale on the roller. The designs engraved oncalico-printers rolls consist of parts of leaves, stems, and flowersplaced obliquely to the center of the design on opposite sides. Tofacilitate the engraving and to reduce the cost of the pattern, one sideof the'design, or in some cases one of the figures of the design, onlyis cut into the pattern to be traced by the stylus. The carriagessupporting the gravers are connected, so that one or more carriages movelongitudinally with the movement of the stylus, and another carriage orcarriages move in the opposite direction, thereby engraving on theroller operated upon both sides of the design at the same time or twosets of figures extending in oppositedirections on a predeterminedreduced scale. The required diminution of the pattern engraved ontheroller from the pattern traced by the stylus determines the adjustmentof the transmitting mechanism, so that apattern may be transferred tothe rollers, if de- 7 V with stops.

sired, in the same design on a larger scale and Serial No. 727,876. (Nomodel.)

of the movement of the carriages without disturbing the adjustment, sothata multiple of I designs may be simultaneously engraved on one rollin opposite directions while the operative guides the stylus over onepattern.

Figure 1 is a transverse sectional view of .part of a pantographengraving-machine illustrating our invention. Fig. 2 is a top View ofthe bracket connected with the lower carriage, showing the slottedportion through which the actuating-spindle operated by the movement ofthe stylus-carriage extends.

Fig. 3 is a top view of the end of the bracket in which theactuating-spindle is journaled, showing the opening through which theupper lock-nut of the ball-bearing is adjusted. Fig. 4. is a verticalsectional view of the actuating-spindle, showing the reversible armsoperating the carriages and the antifriction ballbearings for theactuating-spindle. Fig. 5 is a top view of one of the carriage-operatingarms and the supporting-plate provided Fig. 6 is a side View, partly insection, of the same. Figs. 4, 5, and 6 are shown on an enlarged scale.

Similar marks of reference indicate corresponding parts in all thefigures.

In the drawings,Aindicates the main frame of the machine; A, thebracket, extending rearward from the main frame and forming thejournal-support for the actuating-spindle; A the stylus-carriage, and aa bar extending longitudinally on the stylus-carriage. From this bar a,the in ward and outward movement of the stylus-carriage is transmittedto the roller being engraved. a is a bar extending transversely to thestylus-carriage. On this bar a rests and moves longitudinally thelever-operating device G2, called the mushroom, consisting of a framerevolving freely on a post and provided with two conical disks securedto revoluble spindles. The beveled edges of the disks are in contactwith the bar a and move freely longitudinally on the bar, transmitting,however, every movement of the stylus-carriage at a right angle to thebar a. The spindle of the mushroom a is secured in the end of the leverb, pivotally secured to a fork attached to the actuatingspindle B,journaled in the bracket A. To the upper end of the actuating-spindle Bthe plate I) is keyed or otherwise rigidly secured, so as to turn withthe actuating-spindle B.

On one side of the plate Z) are the stops 1) b which are accuratelyplaned, milled, or otherwise finished to form the stops for the arm bsecured by a set-screw to the projecting end of the actuatingspindle B,so that it can be reversed and secured in two opposite positions,bearing on one or the other of the stops b Perpendicularly over theaxial center of the actuating-spindle B the post 11 is secured to thearm Z2 near the upper end of which post 17 is rigidly secured anotherplate I), provided with the stops b 19 and to the projecting end of thepost b is secured another arm b so that it can be turned and securedexactly in the same direction as the lower arm or in the directionexactly opposite to the direction of the lower arm.

When it is required to engrave the design along portions of theprinting-roll and reverse the design on other portions of the roll, itcan be quickly and accurately done without changing the adjustments byreleasing the lower arm 17 and turning it, with the post I) and theupper arm 5 through half a circle until the lower arm 5 bears againstthe opposite stop 11 and then securing the arm again to theactuating-spindle. By thus reversing the positions of the arms b themovement of the carriages supporting the gravers is reversed and thetracing of the design on the pattern will operate the gravers to engravethe design in the reverse direction.

The arms 19 b are accurately planed and of uniform width. The pivotalholes extending over the end of the actuating-spindle B and the end ofthe post I) are in the exact center of the arms, and the grooves 79 12extend along the centers of the arms The grooves are undercut and formthe ways on which the slides Z9 U are supported and secured by the boltsZ1 If. The arms 12 b are provided with a graduated scale and the slidesb with a zero-mark, so that the slides may be accurately adjusted on thearms and require no readjustment when the arms are reversed. The slidessupport the spindles of the mushrooms b 17 on the upper one of whichrests the arm I), pivotally secured to the carriage b, and on the lowermushroom rests the arm b pivotally secured to the carriage I1 The arm 19is provided with the slot Z2 through which the post 19 forming theextension of the actuating-spindle B, passes. The carriages b and Dsupport the diamond gravers.

The bar a on the stylus-carriage A transmits the inward and outwardmovement of the stylus-carriage through a mushroom a to a lever similarto the lever 19, connected with a spindle supported in the bearing a Anarm similar to the arm b is secured to the upper end of the spindle. Thearm is provided with aslide b supporting a mushroom 11 which connectswith a bar on the carriage a connected in the usual manner with the rollto be engraved to impart the rotary movement to the roll at thepredetermined diminished scale.

The actuating-spindle B is provided with two V-shaped grooves formingthe races for a series of balls 0 c. The race-rings c c and the nut-lockrings 0 c are in screw-thread engagement with the sleeve 0 and areprovided with a series of radial holes bored into their peripheralsurfaces. The sleeve 0 is provided with openings 0 through which a pinmay be inserted to enter the peripheral holes in the rings to adjust theraces to the balls. By this construction the actuating-spindle B is heldagainst longitudinal movement and turns freely on the ball-bearings.

Having thus described our invention, we claim as new and desire tosecure by Letters .Patent 1. In a pantograph engraving-machine, thecombination with an actuating-spindle rotatably supported andconnections between the actuating-spindle and the stylus-carriage, of anarm pivotally supported on the actuating-spindle, means for securing thearm to the spindle, a slide adj ustably secured on the arm, a carriagefor supporting the gravers, and connections between the carriage and theadj ustable slide; whereby the movements of the carriage may be reversedwithout adj usting the slide, as described.

2. In a pantograph engraving-machine, the combination with theactuating-spindle, and connections to the actuating-spindle from thestylus-carriage, of a tool-actuating arm journaled on theactuating-spindle, and a bolt for securing the arm to theactuating-spindle; whereby the position of the arm may be reversed, asdescribed.

3. In a pantograph engraving-machine, the combination with theactuating-spindle, and connections between the actuating-spindle and thestylus-carriage, ot' a plate secured to the actuating-spindle, stops 011the plate, a tool-actuating arm journaled at one end so as to swingaround the axial center of the actuating-spindle, and means for clampingthe arm whereby the operating mechanism may be reversed, as described.

4. In a pantograph engraving-machine, the combination with theactuating-spindle B and connections between the actuating-spindle andthe stylus-carriage, of a plate secured to the actuating-spindle, stopson the plate, an arm pivotally connected with the actuating-spindle, apost connected and turning with the actuating-spindle, a plate securedto the post, stops on the plate, an arm pivotally secured on the postabove the plate and adjustable slides on the arms, whereby the two armsmay be swung around the axial center of the actuating-spindle to reversethe arms, as described.

5. In a pantograph engraving-machine, the combination of the followinginstrumentalities: a stylus-carriage, a rotatable actuatingspindlesupported on ballbearings, plates provided with stops turning with theactuating-spindle, arms pivotally connected, turning with and havingcapacity to swing around the vertical axis of the actuating-spindle,adjustable slides on the arms, carriages supporting the gravers, andconnections between the slides on the arms and the carriages and betweenthe actuating-spindle and the styluscarriage; whereby the motionstransmitted JOHN HOPE. JOHN HOPE; J R.

Witnesses:

B. M. SIMMs, J. A. MILLER, Jr.

